-print_r( $table->find(array("dt" => new \pq\Query\Expr("between %s and %s", $conn->quote("2013-03-01"), $conn->quote("2013-03-04")))) );
-echo PHP_EOL;
-print_r( $table->find(array("id>" => 1, "OR" => array(array("id=" => 1), array("id="=>2)))));
-echo PHP_EOL;
-print_r( $table->find(array("OR" => array("id>" => 1, "OR" => array(array("id=" => 1), array("id="=>2))))));
-echo PHP_EOL;
-print_r( $table->create(array("data" => "blabla")) );
-echo PHP_EOL;
-print_r( $table->create(array("data" => new \pq\Query\Expr("DEFAULT"))) );
-echo PHP_EOL;
-print_r( $table->update(array("id=" => 4), array("data" => "die 4")) );
-echo PHP_EOL;
-print_r( $table->delete(array(new \pq\Query\Expr("data is null"))) );
+$rowset = $table->find(array(array("id>" => 1), array("id IS" => new pq\Query\Expr("NULL"))));
+$current = $rowset->current();
+$current->dt->mod(new pq\Query\Expr("- interval '3 day'"));
+$current->update();
+var_dump($current);